Documentation for claim

Debunk claim:

Russian Defense Ministry television channel Zvezda cited a pro-Russian Serbian site as its source. The picture used in the articles allegedly showing Croats fighting on the Ukrainian side in the conflict in Donbas first surfaced in 2015 and was used in an Al Jazeera story. Further debunking http://www.stopfake.org/en/fake-ukrainian-armed-forces-recruiting-mercenaries-from-croatia/